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            <h1 style="display: none">表格列合并</h1>
            
            
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                <h1 id="ant-design-vue-表格列合并"><a href="#ant-design-vue-表格列合并" class="headerlink" title="ant design vue 表格列合并"></a>ant design vue 表格列合并</h1><h2 id="一列合并"><a href="#一列合并" class="headerlink" title="一列合并"></a>一列合并</h2><p>以下是一个示例代码，展示了如何使用 rowSpan 属性来合并表格的一列：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;a-table :columns=&quot;columns&quot; :data-source=&quot;dataSource&quot;&gt;&lt;/a-table&gt;<br>&lt;/template&gt;<br><br>&lt;script&gt;<br>export default &#123;<br>  data() &#123;<br>    return &#123;<br>      columns: [<br>        &#123;<br>          title: &#x27;Name&#x27;,<br>          dataIndex: &#x27;name&#x27;,<br>          key: &#x27;name&#x27;,<br>          customRender: (text, record, index) =&gt; &#123;<br>            if (index &gt; 0 &amp;&amp; text === this.dataSource[index - 1].name) &#123;<br>              return &#123;<br>                children: &#x27;&#x27;,<br>                attrs: &#123;<br>                  rowSpan: 0,<br>                &#125;,<br>              &#125;;<br>            &#125;<br>            const rowspan = this.calculateRowSpan(record.name);<br>            return &#123;<br>              children: text,<br>              attrs: &#123;<br>                rowSpan: rowspan,<br>              &#125;,<br>            &#125;;<br>          &#125;,<br>        &#125;,<br>        &#123;<br>          title: &#x27;Age&#x27;,<br>          dataIndex: &#x27;age&#x27;,<br>          key: &#x27;age&#x27;,<br>        &#125;,<br>      ],<br>      dataSource: [<br>        &#123; name: &#x27;John&#x27;, age: 25 &#125;,<br>        &#123; name: &#x27;John&#x27;, age: 30 &#125;,<br>        &#123; name: &#x27;Sarah&#x27;, age: 28 &#125;,<br>        &#123; name: &#x27;Sarah&#x27;, age: 32 &#125;,<br>      ],<br>    &#125;;<br>  &#125;,<br>  methods: &#123;<br>    calculateRowSpan(name) &#123;<br>      let count = 1;<br>      this.dataSource.forEach((item) =&gt; &#123;<br>        if (item.name === name) &#123;<br>          count++;<br>        &#125;<br>      &#125;);<br>      return count;<br>    &#125;,<br>  &#125;,<br>&#125;;<br>&lt;/script&gt;<br></code></pre></td></tr></table></figure>

<p>在这个示例中，我们使用 <code>customRender</code> 方法自定义了 Name 列的渲染。我们在 <code>customRender</code> 方法中判断当前行的 name 值是否与上一行相同，如果相同则返回一个空元素，并将 <code>rowSpan</code> 设置为 0，实现了单元格合并的效果。对于其他行，我们根据 name 值的出现次数计算需要设置的 <code>rowSpan </code>值。</p>
<h2 id="多列合并"><a href="#多列合并" class="headerlink" title="多列合并"></a>多列合并</h2><p>当你有多列需要合并时，可以使用一个辅助函数来计算每个单元格的 <code>rowSpan</code> 值，并将该函数应用于每一列。<br>以下是简化后的代码示例：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br></pre></td><td class="code"><pre><code class="hljs vue">&lt;template&gt;<br>  &lt;a-table :columns=&quot;columns&quot; :data-source=&quot;dataSource&quot;&gt;&lt;/a-table&gt;<br>&lt;/template&gt;<br><br>&lt;script&gt;<br>export default &#123;<br>  data() &#123;<br>    return &#123;<br>      columns: [<br>        &#123;<br>          title: &#x27;#&#x27;, // 列标题<br>          dataIndex: &#x27;index&#x27;, // 映射的数据字段<br>          key: &#x27;index&#x27;, // 列的唯一标识<br>          width: 50, // 列的宽度<br>          // 自定义渲染函数，用于显示序号列<br>          customRender: this.customRenderWithoutRowSpan,<br>        &#125;,<br>        &#123;<br>          title: &#x27;Name&#x27;, // 列标题<br>          dataIndex: &#x27;name&#x27;, // 映射的数据字段<br>          key: &#x27;name&#x27;, // 列的唯一标识<br>          // 自定义渲染函数，用于显示合并单元格<br>          customRender: this.customRenderWithRowSpan(&#x27;name&#x27;),<br>        &#125;,<br>        &#123;<br>          title: &#x27;Age&#x27;, // 列标题<br>          dataIndex: &#x27;age&#x27;, // 映射的数据字段<br>          key: &#x27;age&#x27;, // 列的唯一标识<br>          // 自定义渲染函数，用于显示合并单元格<br>          customRender: this.customRenderWithRowSpan(&#x27;age&#x27;),<br>        &#125;,<br>        &#123;<br>          title: &#x27;Gender&#x27;, // 列标题<br>          dataIndex: &#x27;gender&#x27;, // 映射的数据字段<br>          key: &#x27;gender&#x27;, // 列的唯一标识<br>          // 自定义渲染函数，用于显示合并单元格<br>          customRender: this.customRenderWithRowSpan(&#x27;gender&#x27;),<br>        &#125;,<br>      ],<br>      dataSource: [<br>        &#123; name: &#x27;John&#x27;, age: 25, gender: &#x27;Male&#x27; &#125;,<br>        &#123; name: &#x27;John&#x27;, age: 30, gender: &#x27;Male&#x27; &#125;,<br>        &#123; name: &#x27;Sarah&#x27;, age: 28, gender: &#x27;Female&#x27; &#125;,<br>        &#123; name: &#x27;Dave&#x27;, age: 30, gender: &#x27;Male&#x27; &#125;,<br>        &#123; name: &#x27;Sarah&#x27;, age: 32, gender: &#x27;Female&#x27; &#125;,<br>      ],<br>    &#125;;<br>  &#125;,<br><br>  methods: &#123;<br>    // 计算指定数据字段的合并行数<br>    calculateRowSpan(dataIndex, value) &#123;<br>      let count = 1; // 默认为1行<br>      for (let i = 1; i &lt; this.dataSource.length; i++) &#123;<br>        if (this.dataSource[i][dataIndex] === this.dataSource[i - 1][dataIndex]) &#123;<br>          // 当前行的数据与前一行相同时，行数加1<br>          count++;<br>        &#125; else &#123;<br>          break; // 连续相同数据结束时，停止计算<br>        &#125;<br>      &#125;<br>      return count; // 返回合并行数<br>    &#125;,<br><br>    // 根据数据字段创建自定义渲染函数，用于显示合并单元格<br>    customRenderWithRowSpan(dataIndex) &#123;<br>      return (text, record, index) =&gt; &#123;<br>        if (index === 0 || record[dataIndex] !== this.dataSource[index - 1][dataIndex]) &#123;<br>          // 如果是第一行或者当前行数据与前一行数据不同，进行合并单元格处理<br>          const rowspan = this.calculateRowSpan(dataIndex, record[dataIndex]); // 获取合并的行数<br>          return &#123;<br>            children: text, // 单元格的内容<br>            attrs: &#123;<br>              rowSpan: rowspan, // 设置合并的行数<br>            &#125;,<br>          &#125;;<br>        &#125;<br>        // 否则返回空内容和行数为0，不进行合并单元格处理<br>        return &#123;<br>          children: &#x27;&#x27;,<br>          attrs: &#123;<br>            rowSpan: 0,<br>          &#125;,<br>        &#125;;<br>      &#125;;<br>    &#125;,<br><br>    // 自定义渲染函数，用于显示序号列<br>    customRenderWithoutRowSpan(text, record, index) &#123;<br>      return index + 1; // 返回行号<br>    &#125;,<br>  &#125;,<br>&#125;;<br>&lt;/script&gt;<br></code></pre></td></tr></table></figure>

<p>在上面的示例中，我们将 <code>customRender</code> 方法调整为一个返回自定义渲染函数的辅助函数 <code>customRenderWithRowSpan</code>。我们只需要传递要合并的列的 dataIndex，然后在函数内部使用该 dataIndex 来获取正确的值并计算 <code>owSpan</code>。<br>通过这种方式，可以轻松地对多列进行合并，只需在 columns 配置中对每一列应用相应的 <code>customRender</code> 方法。</p>

                
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